<template>
  <div class="login_container">
    <div class="login_box">
      <!--      头像区域-->
      <div class="avatar_box">
        <img src="../assets/logo2.png" alt="">
      </div>
      <!--      登录表单区域-->
      <div style="height: 100%">
        <el-form ref="loginFormRef" label-width="0px" class="login_form" :model="loginForm" :rules="loginFormRules">
          <!--        用户名-->
          <el-form-item label="" prop="mgName">
            <el-input placeholder="请输入内容" v-model="loginForm.mgName" prefix-icon="iconfont icon-user"></el-input>
          </el-form-item>
          <!--          密码-->
          <el-form-item label="" prop="mgPwd">
            <el-input placeholder="请输入内容" v-model="loginForm.mgPwd" prefix-icon="iconfont icon-3702mima"
                      type="password"></el-input>
          </el-form-item>
          <!--          按钮区域-->
          <el-form-item label="" class="btns" style="margin-bottom: 10px">
            <el-button type="primary" @click="login">登录</el-button>
            <el-button type="info" @click="resetLoginForm">重置</el-button>
          </el-form-item>
          <!--      注册或者登陆-->
          <div class="elink">
            <el-link type="primary" @click="register" :underline="false">注册</el-link>
            <el-link type="info" disabled>/登录</el-link>
          </div>
        </el-form>
      </div>
    </div>
  </div>
</template>

<script>

export default {
  data () {
    return {
      // 登录表单的数据绑定对象
      loginForm: {
        mgName: 'admin',
        mgPwd: '123456'
      },
      // 表单验证规则
      loginFormRules: {
        // 验证用户名是否合法
        mgName: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        // 验证密码
        mgPwd: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置按钮，重置登录表单
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      this.$refs.loginFormRef.validate(async (valid) => {
        // console.log(valid)
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        console.log(res)
        if (res.status !== 200) return this.$message.error('登陆失败！')
        this.$message.success('登陆成功')
        /*
          1.将登陆成功后的token，保存到客户端的sessionStorage中
            1.1项目中的除了登录之外的其他API接口，必须在登录之后才能访问
            1.2token只应在当前网站打开期间生效，所以将token保存在sessionStorage中
           */
        window.sessionStorage.setItem('token', res.data.token)
        // 2.通过编程式导航跳转到后台主页，路由地址是/home
        this.$router.push('/home')
      })
    },
    // 注册页面
    register () {
      this.$router.push('/register')
    }
  }
}
</script>
<!--scoped规定样式只在自己组件内生效-->
<style lang="less" scoped>
  .login_container {
    height: 100%;
    background-color: #2b4b6b;
  }

  .login_box {
    height: 300px;
    width: 450px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    /*margin-left: 20px;*/
    .avatar_box {
      height: 130px;
      width: 130px;
      border: 1px solid #eeeeee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #dddddd;
      position: absolute;
      transform: translate(149px, -50%);
      background-color: white;
      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eeeeee;
      }
    }
  }
  .login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }

  .btns {
    display: flex;
    justify-content: flex-end;
  }
  .elink {
    margin-bottom: 10px!important;
    text-align: center;
  }
</style>
